.login_form {
  background: url('../img/bj.jpg') no-repeat;
  width: 100%;
  height: 100%;
}
.login_form h1 {
  padding-bottom: 20px;
}

.Sign_in {
  background-color: rgba(255, 255, 255, 0.6);
  padding-top: 20px;
  width: 400px;
  height: 250px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  color: #000;
  border-radius: 30px;
}

.Sign_in .ipt_dl {
  width: 70%;
}
